CircuitPython module for the MCP23017 and MCP23008 I2C I/O extenders.

This driver depends on:

• Adafruit CircuitPython
• Bus Device

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.

See examples/mcp230xx_simpletest.py for a demo of the usage.

Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.

To build this library locally you'll need to install the circuitpython-build-tools package.

python3 -m venv .env source .env/bin/activate pip install circuitpython-build-tools

Once installed, make sure you are in the virtual environment:

source .env/bin/activate

Then run the build:

circuitpython-build-bundles --filename_prefix adafruit-circuitpython-mcp230xx --library_location .

Sphinx is used to build the documentation based on rST files and comments in the code. First, install dependencies (feel free to reuse the virtual environment from above):

python3 -m venv .env source .env/bin/activate pip install Sphinx sphinx-rtd-theme

Now, once you have the virtual environment activated:

cd docs sphinx-build -E -W -b html . _build/html

This will output the documentation to docs/_build/html. Open the index.html in your browser to view them. It will also (due to -W) error out on any warning like Travis will. This is a good way to locally verify it will pass.